Scilab Data type
Last update : 9/12/2005

axis_properties - description of the axis entity properties

### Description

The Axis entity is a leaf of the graphics entities hierarchy. This entity defines the parameters for axis scaling and appearance.

  Axis properties
    parent: This property contains the handle of the parent. The parent of the axis entity should be of the type `"Axes"` or `"Compound"`.
    visible: This field contains the `visible` property value for the entity . It should be `"on"` or `"off"` . By default, the axis entity is visible, the value's property is `"on"`. If `"off"`, the axis is not drawn on the screen.
    tics_direction: Specify the direction of the tics drawn under the horizontal axis and the vertical axis. The possible values of this property are:

      `"top"`. In this case, tics are drawn at the top of the horizontal axis.

      `"bottom"`. In this case, tics are drawn at the bottom of the horizantal axis.

      `"left"`. In this case, tics are going left on the vertical axis.

      `"right"`. In this case, tics are going right on the vertical axis.

    The defaults values are `"top"` for the horizontal axis and `"right"` for vertical axis.

    xtics_coord: This field represent the x-coordinate of the axis. It is a row vector containing values increasing from left to right which give tics positions for a horizontal axis. Other case, the entity is a vertical axis, this property contain a scale which defines the x-origin of the axis.
    ytics_coord: This field represent the y-coordinate of the axis. It is a row vector containing values increasing from bottom to top which give tics positions for a vertical axis. Other case, the entity is a horizantal axis, this property contain a scale which defines the y-origin of the axis.
    tics_color: The value of this properties is index of the color used to draw the axis'lines and tics.
    tics_segment: This field contains a flag which controls the display of the base segment of the axis. The default is `"on"`, else if to not display it, the property takes `"off"` as value.
    tics_style: This property describes how the tics are given. It is a string flag which can have these possible values:

      `"v"`. It's the default value, In this case, tics positions are given by the row factor `xtics_coord` for horizontal axis (`ytics_coord` for the vertical one).

      `"r"`. In this case, tics positions are given by the vector `[min,max,n]` where n is the number of intervals.

      `"i"`. In this case the vector given tics positions is of size 4, `[k1,k2,a,n]` then values are increasing between `k1*10^a` and `k2*10^a`, n is the number of intervals.

    sub_tics: This field sets the number of tics to draw between two main tics.
    tics_labels: This filed is a string matrix, which contains the strings to be drawn along the axis at tics positions.
    labels_font_color: This property determines the color of the tics labels.
    labels_font_size: An integer specifying the font size used to draw the tics labels.
    clip_state: This field contains the `clip_state` property value for the arc. Clip_state value should be :

      `"off"` this means that the axis is not clipped

      `"clipgrf"` this means that the axis is clipped outside the Axes box.

      `"on"` this means that the axis is clipped outside the arc given by property clip_box.

    clip_box: This field is to determinate the `clip_box` property. By Default its value should be an empty matrix if clip_state is "off". Other cases the vector `[x,y,w,h]` (upper-left point width height) defines the portions of the axis to display, however `clip_state` property value will be changed.
    user_data: This field can be use to store any scilab variable in the axis data structure, and to retreive it.

### Examples

      set("figure_style","new") //create a figure
       a=get("current_axes");//get the handle of the newly created axes
       a.data_bounds=[-1,-1;10,10];

      drawaxis(x=2:7,y=4,dir='u');
      a1=a.children(1)
      a1.xtics_coord=[1 4 5  8 10];
      a1.tics_color=2;
      a1.labels_font_size=3;
      a1.tics_direction="bottom";
      a1.tics_labels= [" February" "May"  "june" "August"  "October"];

      drawaxis(x=1.2:1:10,y=5,dir='u',textcolor=13);
      a2=get("hdl")
      a2.sub_tics=0;
      a2.tics_segment="off";
      a2.ytics_coord=4;

      drawaxis(x=-1,y=0:1:7,dir='r',fontsize=10,textcolor=5,ticscolor=6,sub_int=10)
      a3=get("hdl");
      a3.tics_labels= 'B'  +string(0:7);
      a3.tics_direction="left";

### See Also

`set`, `get`, `delete`, `drawaxis`, `graphics_entities`,

### Author

Djalel ABDEMOUCHE